Structure Analysis of K3D(SO4)2at Room Temperature

Noda, Yukio; Kasatani, Hirofumi; Watanabe, Y.; Terauchi, Hikaru; Gesi, K.

doi:10.1143/jpsj.59.3249

Cited by 41 publications

(24 citation statements)

References 15 publications

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“…Deuteration-induced phase transitions have also been found in Rb 3 D͑SeO 4 ͒ 2 and its homologs, 34,35,[42][43][44][45] NaOD, 46 and a molecular crystal 5-bromo-9-hydoxyphenalenone. [47][48][49] In all of these including the present compound the hydrogen ͑and deuterium͒ atoms are confined in a shallow multi-valley potential either in the translational or in the angular coordinate.…”

Section: Rmentioning

confidence: 99%

Deuteration-induced phase transition in ammonium hexachloroplumbate

Kume

Muraoka

Yamamuro

et al. 1998

The Journal of Chemical Physics

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The heat capacities of ͑NH 4 ͒ 2 PbCl 6 and ͑ND 4 ͒ 2 PbCl 6 were measured at temperatures between 13 K and 300 K. A gradual phase transition was found at 77.8Ϯ0.3 K for ͑NH 4 ͒ 2 PbCl 6 with an associated transition entropy of 3.0 J K Ϫ1 mol Ϫ1 . The transition temperature shifted to 81.0Ϯ0.3 K in ͑ND 4 ͒ 2 PbCl 6 . A sharp first order transition occurred at 38.40Ϯ0.03 K for ͑ND 4 ͒ 2 PbCl 6 accompanied by a transition entropy of 7.5 J K Ϫ1 mol Ϫ1 . There was no corresponding phase change in ͑NH 4 ͒ 2 PbCl 6 . The mechanism of the deuteration-induced transitions in the present compound and similar transitions in ͑ND 4 ͒ 2 TeCl 6 , ͑ND 4 ͒ 2 PtCl 6 , ͑ND 4 ͒ 2 PdCl 6 , and ͑ND 4 ͒ 2 SeCl 6 is discussed. Tunneling energies involved in the rotational motion of the ND 4 ϩ ion in the three-minimum potential were derived from the experimental entropy data. They correlate smoothly with the metal-chlorine bond distance for these five isomorphous compounds. Standard thermodynamic functions calculated from the heat capacity data are tabulated in the Appendix.

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Section: Rmentioning

confidence: 99%

Deuteration-induced phase transition in ammonium hexachloroplumbate

Kume

Muraoka

Yamamuro

et al. 1998

The Journal of Chemical Physics

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“…The roomtemperature crystal structures of (NHa)2H(SO4)2 (Leclaire, Led6sert, Monier, Daoud & Damak, 1985), (NDa)3D(SO4) 2 (Tanaka & Shiozaki, 1981), K3H(SO4)2 (Noda, Uchiyama, Kafuku, Kasatani & Terauchi, 1990), K3D(SO4) 2 (Noda, Kasatani, Watanbe, Terauchi & Gesi, 1990) and Rb3H(SO4)2 (Makarova, Verin & Shchagina, 1986) have been determined as monoclinic, although Davis & Johnson (1984) have found a triclinic deformation of…”

Section: Commentmentioning

confidence: 99%

Structure of phase III of (NH4)3H(SeO4)2

Pietraszko¹,

Łukaszewicz²,

Augustyniak³

1992

Acta Crystallogr C

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Bis(ethylenediamine)(phenanthrenequinone diimine)-rhodium(Ill) tribromide trihydrate has a nearly planar phenanthrenequinone diimine ligand and two ordered ethylenediamine ligands, giving a distorted octahedral coordination to the compound. The N--Rh--N angles range from 77.1 (6) to 96.5 °, with the largest deviations from 90 ° associated with the N atoms of the phenanthrenequinone diimine ligand. The two Rh--N distances involving these N atoms are 0.05 A shorter than Rh--N distances to ethylenediamine ligands; other distances and angles are within normal ranges.

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“…K3D(SO4)2 shows an antiferroelectric phase transition at 85 K, but K3H(SO4)2 does not show a phase transition at low temperatures (Gesi, 1980). Structure analyses of K3H(SO4)2 (Noda, Uchiyama, Kafuku, Kasatani & Terauchi, 1990) and K3D(SO4)2 (Noda, Kasatani, Watanabe, Terauchi & Gesi, 1990) at room temperature have already been performed; and for both the space group was A2/a. The hydrogen bonds are isolated and do not form a network.…”

Section: K3d(so4)2 (92% Deuterium)mentioning

confidence: 99%

Development of a Low-Temperature X-ray Diffractometer with a Weissenberg Camera utilizing an Image Plate

Kuroiwa¹,

Tamura²,

Ohe³

et al. 1995

J Appl Cryst

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A new type of X-ray apparatus with an image plate as an area detector has been developed in order to study phase transitions at low temperatures. The system is essentially composed of a high-precision-type doubleaxis diffractometer with a vertical-type Weissenberg camera controlled by a computer and is combined with a helium-gas closed-cycle cryogenic refrigerator. Oscillation and Weissenberg photographs down to 12 K were taken with an image plate. The image plate is replaced easily by a conventional scintillation counter, so that both photographic and counter methods are available. New superlattice reflections associated with the phase transition of an isolated hydrogen-bond system, K3D(SO4)2, were observed at 15 K, and the space group of the low-temperature phase was determined. The anisotropic diffuse scattering around Bragg reflections in Fe-30.2 at.% Pd was also clearly observed in connection with a martensite phase transition.

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Structure Analysis of K₃D(SO₄)₂at Room Temperature

Cited by 41 publications

References 15 publications

Deuteration-induced phase transition in ammonium hexachloroplumbate

Deuteration-induced phase transition in ammonium hexachloroplumbate

Structure of phase III of (NH4)3H(SeO4)2

Development of a Low-Temperature X-ray Diffractometer with a Weissenberg Camera utilizing an Image Plate

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